Things in fiction have to wear "stage makeup". This is because the subtlety and complexity of the real world is essentially impossible to get across in only a few thousand words, especially if you also want to tell a story. So characters and events have to be a bit more exaggerated, have a bit more definition than they would normally. It's similar to the way an actor on stage in a theatre wears stage makeup. Up close such makeup would appear garish, but from tens or hundreds of meters away it makes the features of a character's face more distinctive, makes people easier to tell apart, makes emotions more obvious, etc.

The same is true of the socio-cultural and political systems in these dystopias. 1984 and Brave New World are both caricatures of ideas about the evolution of society. They are meant to draw people's attentions to the problems inherent in the idea by advancing it to an extreme that would probably never exist in real life.

In reality we've seen that the examples presented in both 1984 and Brave New World provide practical examples of problems that have become very real over time. It turns out that massive government surveillance and incredible state control over everyone's lives is a big deal, and something that is actually far more common and far more easily put in place than we would have ever imagined.